31323121220122 has 16 divisors (see below), whose sum is σ = 47581273641600. Its totient is φ = 15462712081440.

The previous prime is 31323121220101. The next prime is 31323121220123. The reversal of 31323121220122 is 22102212132313.

It is a super-2 number, since 2×31323121220122² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31323121220123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240222 + ... + 7918582.

It is an arithmetic number, because the mean of its divisors is an integer number (2973829602600).

Almost surely, 2^{31323121220122} is an apocalyptic number.

31323121220122 is a deficient number, since it is larger than the sum of its proper divisors (16258152421478).

31323121220122 is a wasteful number, since it uses less digits than its factorization.

31323121220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7704261.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31323121220122 its reverse (22102212132313), we get a palindrome (53425333352435).

The spelling of 31323121220122 in words is "thirty-one trillion, three hundred twenty-three billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-two".